NEET BIOLOGY

Detailed explanation-1: -Second, they increase reaction rates without altering the chemical equilibrium between reactants and products. Note that the enzyme (E) is not altered by the reaction, so the chemical equilibrium remains unchanged, determined solely by the thermodynamic properties of S and P.

Detailed explanation-2: -Like all catalysts, enzymes take part in the reaction-that is how they provide an alternative reaction pathway. But they do not undergo permanent changes and so remain unchanged at the end of the reaction. They can only alter the rate of reaction, not the position of the equilibrium.

Detailed explanation-3: -It is important to remember that enzymes do not change whether a reaction is exergonic (spontaneous) or endergonic. This is because they do not change the free energy of the reactants or products. They only reduce the activation energy required for the reaction to go forward (Figure 1).

Detailed explanation-4: -As the enzyme catalyzes the reaction and converts the substrate into a product, the product is then released from the enzyme’s active site. The enzyme becomes free again to start another round of reaction in the same way that is by enzyme-substrate complex formation.

Detailed explanation-5: -The enzymes change their shape which is known as induced fit. Enzymes can reverse back to their original shape once the reaction is carried out. Examples-ligases, salivary amylase, trypsin, maltase, etc.